Epicureans, Close to the truth?

Lucretius, Aristotle, and Plato all seem to be on the same track to me. Plato is searching for the way to achieve perfect justice and believes that would lead to everyone living a satisfying life. While Aristotle seems to take it one step further foregoing justice and arguing that we should instead judge everything based on what brings people the most happiness or in other words leads to them living well and doing well. This sounds awfully similar to Plato’s end goal and his idea of ergon. Lucretius seems to further refine these two previous ideas by stating the goal should be the removal of pain or as close to it as possible because in the end that would lead to happiness in a more general sense. All seem to be trying to get close to what every individual wants. In my understanding Lucretius and the epicureans seem to have hit the bull’s-eye. By definition pain is something that is a negative experience so by eliminating the negatives in life nothing would remain but happiness and pleasure and at the very least neutral experiences. The stoics however seem to abandon this seemingly well done refinement of ideas and go down a different path. Stoics make assumptions that are not necessarily true like that somehow in nature there is a path for everyone laid out. This seems to be more hopeful and more abstract. What “nature” demands can be interpreted in many different ways and leaves room for error. However close to what everyone truly desires in life the epicureans might be their ideas on free will seem unnecessary. Adding a “swerve” to the universe is not necessary to make our choices valid effectually. Our choices still say something about us and how we think no matter how deterministic the universe is. Swerve seems to be trying to fix a problem that does not truly exist. The illusion of free will is enough to maintain meaning in our choices. ISIS is no less responsible for their actions whether or not free will truly exists. The blame is still on them, free will may not exist but there is still an abstraction of it that is relevant to us. Ultimately epicureans seem to have the most well refined philosophy out of the four to me. Aristotle and Lucretius both have very similar ideas at the core one aiming for the positive another eliminating the negative.